Click to move a character in a terrain

Hi everyone, I'm working on a point & click game and I'm having issues moving the character.

What I want is the same as here: http://answers.unity3d.com/questions/213152/move-to-clicked-point.html

And with that code I have a character moving around without problems. But when I use a terrain the character does weird things:

• Character Controller: if I use this component, the character pass through the elevations, it doesn't care, just continues walking.

• Rigid Body: so in the way of fixing that I removed the character controller and put a rigid body with a capsule collider. Now it works colliding with the terrain, but that led me to another problem.

The problem: the character is vibrating on the floor.

So I tried different configurations of the Rigidbody:

• Interpolate: interpolate / extrapolate. Works the same.

• Is kinematic on: it doesn't collide anymore with the terrain.

• Use gravity off: it doesn't vibrate anymore, but when I climb a lift I continue to be up, so I need to fall.

For moving the character I'm using (I don't know if it's related or not):

 transform.position = Vector3.MoveTowards(transform.position, targetPosition, Time.deltaTime * speed);

So any suggestion? Thanks!

SOLUTION

So I ended up with the robertbu solution and worked very well: It needs:

• Rigidbody: uncheck Use Gravity.

• Capsule Collider

And this code in C#

 void LateUpdate () {
     Vector3 newpos = transform.position; 
     newpos.y = Terrain.activeTerrain.SampleHeight(transform.position);
     transform.position = newpos;
 }